How To Work With Glass Tiles

Many homeowners use glass tiles as backsplashes in kitchens and shower walls in bathrooms, and it’s easy to see why. These versatile tiles are luminous and sleek. However, working with glass tiles requires specific techniques to achieve professional results. In this guide, we’ll explore what you need to know to install glass tiles successfully—and you can watch This Old House tile contractor Joe Ferrante install a glass tile backsplash in a kitchen in the video above.

Gathering Tools and Materials To Work With Glass Tiles

To work with glass tile, you’ll need the following tools and materials:

• Flat trowel
• Grout sponge
• Margin trowel
• Rubber grout float
• Screwdriver
• Spacers
• Tape measure
• Thinset mortar
• Tile cutter
• Undercover saw
• Utility knife
• Wet tile saw
• Glass tile sheets

Preparing the Surface

A smooth, clean surface will help your glass tiles adhere to the wall. Follow these steps to prepare your installation area:

1. Clean the surface thoroughly, removing any dirt, dust, or debris.
2. Repair any cracks or imperfections in the wall or surface.
3. Apply a thin skim coat of thinset mortar to the wall using a flat trowel.
4. Smooth the thinset with a straight-edge trowel and wet sponge.
5. Allow the skim coat to dry completely before proceeding with tile installation.

Planning Your Glass Tile Layout

Take your time with this project. Glass is delicate to work with, and you want to measure and fit the tiles perfectly for a professional-looking finish. 

Measuring and Marking

Begin by measuring the length and height of your installation area. Use these measurements to determine the optimal tile layout. In the video, Ferrante demonstrates how to measure from the countertop to the cabinets and from the casing to the edge of the countertop to plan the tile placement. This will help you achieve a neat and organized setup, reducing the need for small filler pieces that can detract from the overall look.

Dry Fitting Tiles

Dry fitting involves laying out your tile sheets on a flat surface like a countertop. This allows you to visualize the final layout and make any necessary adjustments before committing to the installation. You can identify any potential issues with alignment or cuts and resolve them during this step. Account for the grout lines and align the sheets as they will appear once installed.

Installing Glass Tile

With your surface prepared and layout planned, you’re ready to begin the installation process. 

Applying Thinset Mortar

Mix the thinset mortar to a slightly looser consistency than you would for ceramic tile. Spread a thin, even layer of it to the wall using a flat trowel rather than a notched trowel to avoid visible lines showing through the translucent tiles. Work in small sections to prevent the mortar from drying before tile placement.

Setting the Tile Sheets

Align the first tile sheet with your predetermined starting point. Gently press the tiles into the thinset, ensuring even contact. Consistent pressure helps bond the tiles securely to the wall. Use spacers to maintain consistent grout lines between sheets.

Cutting and Fitting Tiles

Glass tile requires special cutting techniques to achieve clean, precise cuts. Here are a few tips to cut and fit your tiles:

• Use a wet tile saw for straight cuts on individual tiles or sheets.
• For cuts around outlets or other obstacles, use a score-and-snap tile cutter. Score the tile along the desired cut line, then snap it off cleanly.
• When cutting around electrical outlets, remove individual tiles from the sheet as needed and cut them to fit. This ensures a snug and accurate fit around these fixtures.
• For areas where the tile meets trim or other obstructions, use an undercut saw to create space for the tile to fit behind the trim. 

Grouting and Finishing

Once all tiles are in place and the thinset has cured, grout the tiles to complete your glass tile installation. Follow these steps to grout and finish your glass tile installation:

1. Choose a grout color that complements your glass tile.
2. Mix the grout according to the manufacturer’s instructions.
3. Use a rubber float to force grout into the spaces between tiles. Applying diagonal strokes across the tiles helps distribute the grout and fill all gaps evenly.
4. Work in small sections, removing excess grout with a damp sponge as you go. Keeping the sponge clean and rinsed frequently prevents smearing.
5. Allow the grout to set according to the manufacturer’s recommendations.
6. After the grout has fully cured, clean the tile surface with a soft, damp cloth to remove any remaining haze. This final cleaning brings out the shine of the glass tiles without damaging the grout.
7. If recommended by the manufacturer, apply a sealer to protect the grout lines. Sealing helps to maintain the appearance and durability of the grout. Polish the glass tiles with a clean, dry cloth for a sparkling finish.

Glass tiles can be a beautiful addition to your home. By following the steps outlined by This Old House’s Ferrante, you can have stunning results. Take your time and plan carefully for the best outcome.